GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Control Module (BCM)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

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Body Control Module (BCM) Connector C1 (BRN) (24 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Brake Fluid Level Switch (325 Series)

On the master cylinder

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Data Link Connector (DLC)

Lower left of the IP

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Electronic Brake Control Module (EBCM) (325 Series)

On the brake pressure modulator valve (BPMV), toward the rear of the LF fenderwell

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Electronic Brake Control Module (EBCM) (325 Series) Connector C1 (16 Cavities) (BLK)

The body harness connector on the left side of the EBCM

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Electronic Brake Control Module (EBCM) (325 Series) Connector C2 (2 Cavities) (BLK)

The SRS body harness connector on the left side of the EBCM

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Four Wheel Drive Indicator Switch

At the front axle, to the right of the differential

Transfer Case Control Component Views in Transfer Case - NVG 233 (NP1)

Transfer Case Control Connector End Views in Transfer Case - NVG 233 (NP1)

Instrument Cluster

In the IP, ahead of the steering column

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges and Console

Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

IP Fuse Block

LH of the IP, near the side door jamb switch

Power and Grounding Component Views in Wiring Systems

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Powertrain Control Module (PCM)

On the right side of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

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Powertrain Control Module (PCM) Connector C1 (2.2L)

On the right side of the engine compartment

Engine Controls Component Views in Engine Controls - 2.2L

Powertrain Control Module Connector End Views in Engine Controls - 2.2L

Stop Lamp Switch

Mounted on the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Transfer Case Shift Control Module

Behind the RF kick panel

Transfer Case Control Component Views in Transfer Case - NVG 233 (NP1)

Transfer Case Control Connector End Views in Transfer Case - NVG 233 (NP1)

Underhood Fuse Block

On the top of the left inner wheelwell

Power and Grounding Component Views in Wiring Systems

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Underhood Fuse Block Connector C1 (68 Cavities) (Body)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C2 (68 Cavities) (Engine)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C6 (2 Cavities) (Body)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (4.3L)

Right side of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

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Vehicle Control Module (VCM) (4.3L) Connector C1 (BLU) (32 Cavities)

Right side of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

VCM Connector End Views in Engine Controls - 4.3L

Wheel Speed Sensor, LH

Part of the left wheel knuckle and hub

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Wheel Speed Sensor, RH

Part of the right wheel knuckle and hub

Antilock Brake System Component Views

Antilock Brake System Connector End Views

C101 (16 Cavities) (2.2L)

Engine harness to body harness, right of the engine compartment, near the PCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C101 (10 Cavities) (4.3L)

Engine harness to body harness, right of the engine compartment, near the VCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C109 (2 Cavities)

Body harness to the 4 WAL/SRS harness near the EBCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C114 (2 Cavities)

Body harness to front axle switch extension harness, left center of the engine compartment, near the EBCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C203 (116 Cavities)

Body harness to IP harness, to the right of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102 (2.2L)

(CKT 350) At the engine harness, RF of the engine block, under the generator

Harness Routing Views in Wiring Systems

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G102 (4.3L)

(CKT 350) Engine harness, RR of the cylinder head

Harness Routing Views in Wiring Systems

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G110

(CKT 150) Body harness, near the windshield washer pump

Harness Routing Views in Wiring Systems

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P100

IP bulkhead pass-through, LR of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

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S138

(CKT 420) Body harness, between the breakout to VCM connector C4 and the windshield wiper motor breakout, 32 cm (13 in) from the breakout to the motor

Harness Routing Views in Wiring Systems

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Splice Pack SP201

Body harness, to the left of the IP, below the IP fuse block, taped to the body harness

Harness Routing Views in Wiring Systems

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